The students ________ their classroom every day. ( )

A．cleans

B．clean

C．cleaned

D．are cleaning

按要求完成句子。
【小题1】Everyone _________ (study) hard every day!
【小题2】Our teacher _________ (learn) us to play ping-pong yesterday.
【小题3】Danny couldn’t _________ (throw) the ball.
【小题4】My father _________ (answer) me some questions now.
【小题5】Did he _________ ( watch)a basketball this morning?

Read, choose and correct：
She couldplays basketball then. （______）___________
A B     C

I usually ______ basketball on Sundays. (   )

A．play

B．playing

C．is playing

I      the pen, but I can't      it now. (   )

A．looked for; found

B．found; look for

C．looked for; find